package com.xuecheng.gateway.filter;

import com.alibaba.fastjson.JSON;
import com.xuecheng.commons.model.vo.AuthInfo;
import com.xuecheng.commons.utils.JwtUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
@Component
public class AuthFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        String path = request.getURI().getPath();
        if(path.contains("coursePub/preview") ||
                path.contains("auth/login") ||
                path.contains("basic/dictionary") ||
                path.contains("category/tree-nodes")||
                path.contains("course/upload")||
                path.contains("search/")){
            return chain.filter(exchange);
        }

        String token = request.getHeaders().getFirst("Authorization");
        if (!JwtUtils.verifyToken(token)){
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        AuthInfo authInfo = JwtUtils.getInfoFromToken(token);

        ServerHttpRequest httpRequest = request.mutate().headers(httpHeaders -> {
            httpHeaders.set("payload", JSON.toJSONString(authInfo));
        }).build();
        exchange.mutate().request(httpRequest);
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
